package cn.xyh.catboat.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MyInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {

        if(httpServletRequest.getServletContext().getAttribute("userName") != null) {
            return true;
        }

        String userName = (String) httpServletRequest.getSession().getAttribute("userName");
        if ( userName == null || userName.length() == 0) {
            httpServletRequest.setAttribute("error", "请先登录");
            httpServletRequest.getRequestDispatcher("/admin/toLogin.do").forward(httpServletRequest, httpServletResponse);
            return false;
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}
